Weather patterns do change.
And I'll even give you that I agree deforestation is a far larger contributor to a change in regional weather patterns than any alleged CO2 emissions based warming.
But multiple regional changes worldwide do not necessarily reflect a global source of the problems.
Every time people bring up the shrinking glaciers on Mt. Kilimanjaro and blame global warming I remind them that annual rainfall, and mountain top snowfall, in the area has dropped in line with the increasing deforestation of the surrounding region over the past 60 years. The average amount of snow melting every year has not changed, but when the snow fall drops to near zero the glaciers will shrink.
The Maldives is another place blaming global warming for what are self inflicted problems brought on by over development.
The dust storms of the 1930 were caused by poor farming practices and a drought that hits the area on a regular basis. Many of those flawed practices are little changed since then and the droughts come back. Some areas are worse because larger farming equipment has expanded the reach of the plow.
And what do we have this year? Massive sand storms have hit the American southwest because fields were plowed and crops failed in the dry earth which let the top soil get caught by the wind.
Coincidence? I think not. It is history repeating its self until people learn from it.
Until people stop blaming phantoms and confront real local and regional issues the problems will only get worse.